CN1226792A - Method for transferring and organizing data in radio communication system and foundation stations therefor - Google Patents
Method for transferring and organizing data in radio communication system and foundation stations therefor Download PDFInfo
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- CN1226792A CN1226792A CN 98126728 CN98126728A CN1226792A CN 1226792 A CN1226792 A CN 1226792A CN 98126728 CN98126728 CN 98126728 CN 98126728 A CN98126728 A CN 98126728A CN 1226792 A CN1226792 A CN 1226792A
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- information
- organizational information
- frequency
- base station
- transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
- H04W16/12—Fixed resource partitioning
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
Abstract
The method involves providing by a base station (BS) frequency channels in a first frequency range for transmitting useful information for a first radio range. The base station provides in a second frequency range at least a frequency channel for organisation information for the first radio range. The second frequency range does not overlap with the first frequency range and is used for the transmission of the organisation information.
Description
The present invention relates to a kind of being used in the method and the base station of wireless communication system transmission organizational information, described communication system particularly has the wireless communication system of TD/CDMA user's dividing mode.
In wireless communication system, transmit information (for example voice, pictorial information or other data) through a wave point that is positioned between the wireless station of sender and the wireless station of recipient (base station or the mobile radio station) by means of electromagnetic wave.Electromagnetic wave propagation is undertaken by carrier frequency, and this frequency is arranged in the frequency band that corresponding system sets.In GSM (global system for mobile communications), described carrier frequency 900,1800 or the 1900MHz scope in.To TDMA or the TD/CDMA transmission method that adopts in the future,, stipulated the frequency in the frequency band of about 2000MHz by the wave point mobile radio network that constituted of UMTS (general mobile telecommunication system) or other third generation systems for example.
The mobile radio communications system GSM (global system for mobile communications) that uses is the mobile communication system of a kind of TDMA of having user partitioning component (time division multiple access) at present.According to a kind of frame structure, the practical information that the user connects is transmitted in time slot.This transmission is carried out in the mode of data block.In known GSM mobile radio communications system, the teamed channel (BCCH transmitting control channel) that adapts to frame structure time grid is arranged equally, be used for organizational information is transferred to all mobile radio stations of each cellular radio communication.This organizational information comprises about the data of stacking area, cellular radio communication, channel configuration aspects, also comprises the option data that honeycomb inside is supported.Other signalling information are entering the upwards transmission with the sender.
According to the organizational information with maximum power transmission, mobile radio station carries out power measurement, and the result who draws allows the cellular radio communication communication that is suitable for connecting or transfers (handover) through one.This teamed channel is in an own time slot, transmits in the practical information frequency range.So to organizing data channel not have separating on frequency with the utility data channel.
DE19713667 discloses the wireless communication system that a kind of TDMA/CDMA of having user divides (code division multiple access), and the same and practical information of organizational information is wherein launched in a frequency range together.The shortcoming of this scheme is, can produce extra noise, and this noise is that teamed channel is taken in the utility data channel.Practical information also can be disturbed the transmission of organizational information on the other hand.So this will cause reducing of teamed channel propagation distance.
Task of the present invention is to improve the propagation distance of organizational information.The base station that the method that this task is explained by the feature of claim 1 and the feature of claim 10 are explained is resolved.Other favourable improvement of the present invention embody in the dependent claims.
Be used in the method for wireless communication system transmission organizational information of the present invention, described base station is provided for the channel to first coverage transmission practical information in a first frequency scope, and described base station one with the nonoverlapping second frequency scope of first frequency scope in be provided for transmitting at least one channel of organizational information to first coverage.In this channel, send described organizational information.
Adopt this scheme can reduce interference between practical information transmission and the organizational information transmission.In the planning of wireless network, the distribution of practical information channel can be different from the distribution of organizational information channel.So can obtain two different allocative decisions, it can be selected according to minimal interference in the range for wireless communication.
By the division on this frequency, can eliminate teamed channel transmission range limited " bottleneck ", because the power adjustment of organizational information no longer is subjected to interfering the strong influence of restriction.
According to a kind of favourable scheme of the present invention, described frequency range is the broadband, and uses CDMA coding described practical information of expansion and organizational information.So the method for the invention also is applicable to broad-band channel, information wherein can be carried out anti-interference transmission.For the TDMA/CDMA transmission method, the present invention has done further improvement, promptly transmits described practical information according to a kind of TDMA user's division methods in time slot.This scheme is a kind of replenishing to existing GSM mobile radio communication network, need not to change its time grid.
Described organizational information can perhaps transmit in time slot according to a kind of TDMA user's division methods according to a kind of DS-CDMA method expansion transmission.In the second frequency scope, teamed channel can realize according to different requirements.The DS-CDMA transmission can be undertaken by a higher spreading coefficient, thereby further reduces to interfere, and the data transmission rate of organizational information also will reduce certainly.TDMA is transmitted in and allows when calculating to adopt and the practical information similar algorithms.
The CDMA coding that is used for described organizational information preferably extracts from the code set of another coverage, and its frequency range is used for described organizational information.So coding planning can continue to agree with frequency planning.And the mobile radio station that is in other radio zone also can eliminate the interference of teamed channel when detecting, and is known because its CDMA is coded in this radio zone.
Described second frequency scope is extracted from the frequency range of the practical information of an adjacent coverage area, can stagger with practical information simply to the distribution of organizational information frequency band like this.Described coverage is the cellular radio communication of zone or any base station of cellular radio communication.This measure can combine with any error correction coding of a kind of practicality and organizational information.
The present invention is further illustrated for contrast embodiment shown in the drawings below.
Fig. 1 represents the block diagram of a mobile radio communication network.
Fig. 2 represents the frequency partition situation in the prior art.
Fig. 3 represents frequency partition situation of the present invention.
Fig. 4 represents the schematic diagram of described wave point.
Fig. 5 represents the block diagram of an emitter.
Fig. 6 represents the block diagram of a receiver.
The structure of mobile communication system shown in Figure 1 is equivalent to known GSM mobile radio network, and it is made up of several mobile-relay stations MSC, and they are interconnected to net or form path with fixed network PSTN.In addition, this mobile-relay station MSC links to each other with at least one base station controller BSC respectively.Each base station controller BSC can connect at least one base station BS equally.Such base station BS is wireless station, and it is through setting up the information connecting path between a wave point and the mobile radio station MS.
Another coverage Z4 that in the example of Fig. 1, has shown 3 wireless coverage Z1, Z2, Z3 and an adjacent base station BS of a base station BS, be used to transmit practical information ni, signalling information si and organizational information oi, this transmission is carried out between base station BS and mobile radio station MS.Operation and the OMC of maintenance centre can realize control and the maintenance function to the part of this mobile radio network and this net.The function of this structure can be migrated and can be utilized in other wireless communication systems of the present invention.
Described base station BS links to each other with an antenna assembly AE, and this antenna assembly for example is made up of 3 independent transmission bodies.In the described independent transmission body each is all pointed to a zone (Z1, Z2, Z3), and these zones are radio honeycombs that base station BS covers.But also can select more independent transmission body (according to the antenna amount that is connected) thus can use wider user to separate according to SDMA method (space division multiple access).The function of subregion emission is used for practical information ni.
Described base station BS provides organizational information oi about stacking area (LA lane place) and radio honeycomb district (radio honeycomb sign) to mobile radio station.Described organizational information oi is launched away through the independent transmission body of all antenna assembly AE simultaneously.Also carry out theaomni-directional transmission for signalling information si, carry out customer call, because and do not know which zone the mobile radio station MS that will seek is positioned at.In the situation that the base station receives, user access information (arbitrary access) is calculated as the signalling information si that omnidirectional enters.
Communicating to connect of practical information ni between base station BS and mobile radio station MS adopts the multiplexing mode to carry out, and it is to produce together by reflection and direct transmission such as building.The directional transmissions of the particular transmission body by described antenna assembly AE is compared with theaomni-directional transmission and can be produced tall and big antenna gain.So the quality of writing to each other can improve by this directional transmissions.
According to prior art shown in Figure 2, in each area of coverage Z1, Z2, Z3, being transmitted among the utility data channel TCH of practical information ni carried out, and being transmitted among the teamed channel BCCH with same frequency range FB1, FB2 and FB3 of organizational information oi carried out.Interfere so can produce between the signal.ENERGY E is distributed among information ni, the oi of utility data channel TCH and teamed channel BCCH.
According to the present invention shown in Figure 3, continue in described frequency band FB1, FB2 and FB3, to carry out the subregion emission for the practical information ni among the utility data channel TCH.But organizational information oi but be arranged in frequency band FB2, the FB3 of an adjacent areas, the teamed channel of FB1 is transmitted.
Not overlapping between described frequency band FB1, FB2, the FB3.So can significantly reduce interference.Organizational information oi can launch with bigger transmitting power.High (maximum) transmitting power is used for mobile radio station MS as the reference of selecting overlay area FB1, a FB2, FB3.
For adjacent coverage Z4 and the used frequency range FB1 of practical information ni wherein, the interference that teamed channel BCCH produced is also very little, because decay by long transmission path with to the interference of same channel.In addition, a mobile radio station can carry out next step necessary measurement (channel is judged, time and Frequency Synchronization) to the reception of back according to teamed channel BCCH.Although this measurement can not be carried out the employed frequency range in back, this measurement can obtain reliable initial value.
In Fig. 4, the transmission of subscriber signal is carried out at first frequency scope FB1 with bandwidth B through described wave point, for example B=1.6MHz.Described wave point has time multichannel assembly (TDMA) and coding multichannel assembly (CDMA).FB2 is coupled for another frequency band.On time shaft t, the time grid is made up of several slots ts, and for example each time period is divided into 8 time slots, and transmission is carried out in the radio block mode.The subscriber signal of several mobile radio stations MS transmits in same channel simultaneously.The user of each radio block separates by extended code c1 to c8 with as the extended code c9 of a signalling channel and realizes, so can transmit the signal of 8 subscriber signals and a signalling channel simultaneously.All use unified separation method for practical information ni and signalling information si.
Described practical information ni and signalling information si transmit in time slot ts with block mode, and organizational information oi is then irrelevant with the time grid, with continuous wave (CW continuous wave) transmission, perhaps transmit with a second frequency scope FB2 in time slot equally.
Will implement power adjustments for practical information ni, this power adjustments depends in each received power that measure and signalling on each mobile radio station MS and base station BS.Will be to signalling information si to carry out a power adjustments to single mobile station MS in an independent signalling, organizational information oi is then with constant power emission.
Be by the Data Identification that each had extended code C1 to C8 one of to separate realize for practical information ni separating of the data of the data of practical information ni and organizational information oi.Wherein separation is limited by the sheet number of each Data Identification, and represents with Q1 to Q8.The separation Q1 of first subscriber signal for example is 14, and the unique extended code of sign is constantly repeating from the Data Identification to the Data Identification.The implementation of separation of signalling information si with extended code C9 is identical with separating of practical information ni.
The data separating of organizational information oi realizes according to a kind of DS-CDMA method.Wherein, the Data Identification time that one time during plurality of data identifies significantly is longer than practical information ni.Above-mentioned DS extended code be continuous a, separation be C10 extended code, this coefficient is greater than the coefficient of practical information ni.The equal in length of therefore, separating the shim (CHIPS) of practical information ni and organizational information oi.
In addition, can also implement the separation of organizational information oi according to the separation principle of practical information ni.This will simplify the structure of transmitter and receiver.
Fig. 5 represents the structure of an emitter in the base station BS.This emitter comprises a signal processor SP, digital signal processor for example, the control of the controlled device SE of this processor.In addition, this emitter also includes encoder COD, and it is carried out and merges coding (Faltungscodierung) and block encoding function, and mixed function.A combiner MUX combines in first frequency scope FB1 with signal signalling information si practical information ni, and organizational information oi is combined on the tx that transmits in second frequency scope FB2.A transmitting device UE prepares to transmit for emission.The emission of tx of transmitting is implemented by antenna assembly AE.
In signal processor SP, from 8 combinations of the time slot of Port Multiplier K, give time slot of subscriber signal dispensing.In signal processor, utilize extended code that information ni, oi, si are separated and produce signal thus.These signals form broadband signal in combiner MUX.
Figure 6 shows that a receiving system, the received signal rx that receives from antenna assembly AE is strengthened among high-frequency device HF-E, is converted to base band and carries out demodulation.Above-mentioned high-frequency device HF-E conforms to the transmitter UE of emitter.A jockey KE couples together high-frequency device HF-E and signal processing apparatus SP.This signal processing apparatus SP comprises: a JD-processor JD-P as digital signal processor, to detect practical information ni and signalling information si according to the JD-CDMA-method; And a RAKE receiver, in order to detect organizational information oi.When the continuous wave of organizational information oi does not transmit, also detect in the JD-processor.Organizational information oi or signalling information si then only carry out above-mentioned detection to above-mentioned time slot after transmitting in some time slot ts.
This detection is parallel to be carried out, wherein signal processing apparatus SP handles being correlated with of data (korrelieren) of the practical information ni, the signalling information si that receive, have extended code known in receiver and organizational information oi, dwindle the bandwidth of received signal thus, and the gap of signal level and noise level is amplified.Like this, under the strong jamming of interference source or under situation about disturbing between the sign, still can carry out Data Detection.The coding that sends a side in a decoder DEC is cancelled.
In some mobile radio station MS, RAKE-receiver RAKE or JD-processor JD-P measure the received power of organizational information oi among the teamed channel BCCH, and are worth as reference with this power, to determine variation and the power adjustments in other honeycombs.To customer call information (paging), a customer call channel PCH who is directed downwards will be used, thus, some mobile radio station MS compare the data of called mobile radio station MS, if these data conform to the correlation of mobile radio station, then in the user access channel RACH that a direction makes progress, can realize user capture.The anti-error protection that above-mentioned three BCCH channels, PCH and RACH are strengthened is because the user has directional selectivity ground to send or receive.And above-mentioned signalling information si can be transferred on the practical information ni by interference-free in second frequency scope FB2.
Claims (10)
1, be used for transmitting the method for organizational information (oi) at wireless communication system, comprise at least one base station (BS), feature of the present invention is, described base station (BS) is provided for the channel (TCH) to first coverage (Z1) transmission practical information (ni) in a first frequency scope (FB1), described base station (BS) one with the nonoverlapping second frequency scope of first frequency scope (FB1) (FB2) in be provided at least one channel (BCCH) to first coverage (Z1) transmission organizational information (oi), and this channel (BCCH) in transmission described organizational information (oi).
2, the method for claim 1 is characterized in that, described frequency range (FB1, FB2) is the broadband, and uses CDMA coding (c1 ... c10) separate described practical information (ni) and organizational information (oi).
3, as any one described method in the above-mentioned claim, it is characterized in that, in time slot (ts), transmit described practical information (ni) according to a kind of TDMA user's division methods.
4, as any one described method in the above-mentioned claim, it is characterized in that, transmit described organizational information (oi) discretely according to a kind of DS-CDMA method.
5, as any one described method in the claim 1 to 3, it is characterized in that, in time slot (ts), transmit described organizational information (oi) according to a kind of TDMA user's division methods.
6, as any one described method in the claim 2 to 5, it is characterized in that, the CDMA coding (c10) that is used for described organizational information (oi) extracts from the code set of another coverage (Z2, Z4), and its frequency range (FB1, FB2) is used for described organizational information (oi).
As any one described method in the above-mentioned claim, it is characterized in that 7, described second frequency scope (FB2) is extracted from the frequency range of the practical information (ni) of an adjacent coverage area (Z2, Z4).
As any one described method in the above-mentioned claim, it is characterized in that 8, described coverage (Z1, Z2, Z3) is the zone of cellular radio communication.
As any one described method in the above-mentioned claim, it is characterized in that 9, described coverage (Z, Z4) is the cellular radio communication of single base station (BS).
10, be used for transmitting the base station (BS) of organizational information (oi), comprise at wireless communication system:
-one signal processing apparatus (SP) is used to handle practical information (ni) and signalling information (si, oi) through a wave point transmission,
-one control device (SE) that is used for control signal processing unit (SP),
-one is used to produce the transmitting device (UE) of high-frequency emission with transmission signals (rx), wherein be that practical information (ni) is selected a first frequency scope (FB1), and be that organizational information (oi) is selected one and the nonoverlapping second frequency scope of first frequency scope (FB1) (FB2)
-one antenna assembly (AE) that is used for emission transmission signals (rx) in whole first coverage (Z1), wherein the channel of separating by described frequency range (FB1, FB2) (TCH, BCCH) is used to transmit described practical information (ni) and organizational information (oi).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1997147365 DE19747365A1 (en) | 1997-10-27 | 1997-10-27 | Organisation information transmission method for radio communication system |
| DE19747365.2 | 1997-10-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1226792A true CN1226792A (en) | 1999-08-25 |
Family
ID=7846727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98126728 Pending CN1226792A (en) | 1997-10-27 | 1998-10-27 | Method for transferring and organizing data in radio communication system and foundation stations therefor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1226792A (en) |
| DE (1) | DE19747365A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015077973A1 (en) * | 2013-11-29 | 2015-06-04 | Qualcomm Incorporated | Methods and apparatus for interference mitigation in wireless communication system |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6597927B1 (en) | 1999-05-27 | 2003-07-22 | Nortel Networks Limited | Narrow beam traffic channel assignment method and apparatus |
| DE19957288C1 (en) * | 1999-11-29 | 2001-05-10 | Siemens Ag | Channel structure signalling in radio communications system |
| DE10112525B4 (en) * | 2001-03-15 | 2008-03-20 | Nokia Siemens Networks Gmbh & Co.Kg | Transmitter and receiver for interference-free transmission over a transmission channel with maximum permissible spectral power density |
| WO2005109916A2 (en) * | 2004-04-15 | 2005-11-17 | Flarion Technologies, Inc. | Multi-carrier communications methods and apparatus |
-
1997
- 1997-10-27 DE DE1997147365 patent/DE19747365A1/en not_active Withdrawn
-
1998
- 1998-10-27 CN CN 98126728 patent/CN1226792A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015077973A1 (en) * | 2013-11-29 | 2015-06-04 | Qualcomm Incorporated | Methods and apparatus for interference mitigation in wireless communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19747365A1 (en) | 1999-04-29 |
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